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WO2018195095A1 - Actionneur linéaire pour applications ferroviaires - Google Patents

Actionneur linéaire pour applications ferroviaires Download PDF

Info

Publication number
WO2018195095A1
WO2018195095A1 PCT/US2018/027996 US2018027996W WO2018195095A1 WO 2018195095 A1 WO2018195095 A1 WO 2018195095A1 US 2018027996 W US2018027996 W US 2018027996W WO 2018195095 A1 WO2018195095 A1 WO 2018195095A1
Authority
WO
WIPO (PCT)
Prior art keywords
core assembly
rod member
vibration unit
assembly
coil assembly
Prior art date
Application number
PCT/US2018/027996
Other languages
English (en)
Inventor
Syed Reza Sami
Original Assignee
Harsco Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harsco Technologies LLC filed Critical Harsco Technologies LLC
Priority to EP18787290.8A priority Critical patent/EP3612678B1/fr
Publication of WO2018195095A1 publication Critical patent/WO2018195095A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/16—Sleeper-tamping machines
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/20—Compacting the material of the track-carrying ballastway, e.g. by vibrating the track, by surface vibrators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/12—Tamping devices
    • E01B2203/127—Tamping devices vibrating the track surface

Definitions

  • railroad tracks include a pair of parallel rails coupled to a series of laterally extending ties (or sleepers).
  • Ties may be made from concrete or wood.
  • Each tie is coupled to the rails by metal tie plates and/or spring clips.
  • the ties are disposed on a ballast bed.
  • the ballast may be a hard particulate material, such as gravel.
  • the ballast filled space between the ties is called a crib.
  • rails are flexible members that can bend and distort, for example under the load of trains passing over.
  • the ballast acts like a cushion absorbing some of the shock. Ballast can also help keep the rail level and allow moisture and rain water to drain away.
  • ballast may be "tamped" to maintain proper position of the ties. Tamping involves agitating the ballast to allow the particles to re-position, and compact it under the tie. Tampers may also include track stabilizer workheads for applying pressure to a track structure. Additional maintenance procedures may also require actuation of workheads extending from the rail vehicle.
  • Rail maintenance devices such as a tamping device, include one or more workheads mounted on a motorized vehicle that travels on the rails.
  • a workhead may include a pair of elongated, vertically extending tools structured to move together vertically and horizontally. In the tamping context, such workheads cooperate to move together in a pincer-like motion.
  • the workhead may have two sets of tools spaced so that each tool may be disposed on opposite lateral sides of a rail.
  • the workhead may further include a vibration device configured to rapidly vibrate the tools.
  • the vibration device is generally a hydraulic actuator, which may require many components to drive such as hoses, hydraulic circuit pumps, tanks and filters. Moving parts in the hydraulic systems may wear and fail. The hydraulic systems may also leak requiring work stoppage for maintenance.
  • a linear actuator vibrator that achieves a linear actuator-vibrator function, thus achieving both linear motion and vibration motion with high acceleration, velocity and force would be advantageous.
  • a rail maintenance vehicle includes a frame, a workhead, and a vibration unit.
  • the frame includes wheels that travel along rails.
  • the vibration unit takes the form of a linear actuator vibrator that includes a rod member having a coil assembly coupled thereto, and a core assembly.
  • the core assembly includes a plurality of magnet members.
  • the rod member is adapted for insertion into the core assembly, such that the coil assembly cooperates with the magnet members to achieve vibratory motion.
  • the core assembly includes a plurality of magnet members.
  • the rod member is adapted for insertion into the core assembly, such that the coil assembly cooperates with the magnet members to achieve vibratory motion.
  • the controller is operable to pulse current flow to cause the rod member to move linearly and thus produce vibratory motion.
  • FIG. 1A shows a tamping machine rail vehicle where a linear actuator vibrator unit can be implemented, according to an example embodiment.
  • FIG. IB shows an exemplary workhead unit according to the principles of the present disclosure.
  • FIG. 2A shows an isometric view of a linear actuator vibrator.
  • FIG. 2B shows an isometric view of a linear actuator vibrator in an extended position.
  • FIG. 3 shows an exploded isometric view of the linear actuator vibrator of FIGS. 2A and 2B.
  • FIG. 4 shows an exploded isometric view of a core assembly of the linear actuator vibrator of FIGS 2A and 2B.
  • FIG. 5 shows a cutaway view of the core assembly of FIG. 4
  • FIG. 6 shows a front view of a rod assembly of the linear actuator vibrator of
  • FIGS 2 A and 2B are identical to FIGS 2 A and 2B.
  • FIG. 7 shows a front schematic view of the rod assembly of FIG. 6.
  • FIG. 8 shows a front schematic view of the rod and core assembly of FIGS. 4 and 7.
  • the linear actuator vibrator according to the present disclosure is employed in a tamping machine rail vehicle, as illustrated in FIG. 1A. It is to be appreciate that the linear actuator vibrator of the present disclosure may be employed in a variety of rail vehicles, including manned or drone rail maintenance vehicles.
  • FIG. 1A shows a tamping vehicle 100 that includes a frame assembly 102, a propulsion device 104, a tamping device 106, and a cabin 108. In drone embodiments, cabin 108 may be removed.
  • Frame assembly 102 includes a plurality of rigid frame members and a plurality of wheels 109 that are configured to travel on the pair of rails 101. Tamping vehicle 100 travels across a pair of rails 101, disposed over a series of rail ties 103. The rails 101 and series of ties 103 are disposed over a bed of ballast.
  • the propulsion system 104 is configured to move tamping vehicle 100.
  • the tamping device 106 is configured to tamp rail ties 103.
  • the tamping device 106 may include multiple workheads. In the side view of FIG. 1A, one workhead can be viewed while another workhead is also included at an opposite side corresponding with the other rail. Any number of workheads (2, 4, etc) may be included.
  • an exemplary workhead unit 122 may employ a linear actuator vibrator 120 according to the present disclosure.
  • a pair of linear actuator vibrators 120 may be coupled to paddles 110 that form part of the tamping device 106 (collectively, the workhead).
  • the paddles 110 are adapted to be lowered into the ballast.
  • the paddles 110 are vibrated by the linear actuator vibrators 120 to squeeze the paddles around the rail ties.
  • a controller 124 may be electrically coupled to the pair of linear actuator vibrators 120 to selectively provide current flow as will be described.
  • each linear actuator vibrator 120 has a corresponding controller 124. While the controller 124 is depicted as being located proximal to the linear actuator vibrators 120, in practice, the controller 124 or controllers 124 may be positioned remote from the workhead unit 122.
  • the tamping device 106 is coupled to the frame assembly 102 via a subframe 116 and an actuator 118.
  • the actuator 118 is preferably a hydraulic actuator and is operable to lower the tamping device 106 such that the paddles 110 are inserted into the ballast where the squeezing and vibration action tamps the ballast.
  • the tamping vehicle 100 advances to position the tamping device 106 over a tie.
  • the actuator 118 is actuated to lower the tamping device 106 to carry out the tamping of the ballast by actuation of the linear actuator vibrators 120.
  • the actuator 118 is actuated to raise (and in some cases stow) the tamping device 106 for travel to the next tie.
  • FIGS. 2A and 2B show a vibration unit 130 that may be employed as the linear actuator vibrator 120 described above.
  • the vibration unit 130 which may also be referred to as a linear actuator vibrator, may take the form of a frameless linear motor or "ironless" actuator that achieves a linear actuator-vibrator function, thus achieving both linear motion and vibration motion with high acceleration, velocity and force.
  • the linear actuator vibrator 130 includes a rod assembly 132 and a core assembly 134.
  • the rod assembly 132 includes an actuator rod (rod member) 136 with a coupling 138 disposed at a distal end thereof.
  • the coupling 138 may be used to couple the linear actuator vibrator 130 to a frame or workhead unit of a rail vehicle, such as rail vehicle 100.
  • the rod assembly 132 is adapted for connection to a pair of tie rods 140, which in turn are adapted for insertion into the core assembly 134.
  • the rod assembly 132 further includes a coil assembly 142 coupled to the rod 136 as will be further described.
  • the core assembly 134 includes a cover plate 144, which functions as a guide bearing to guide the rod assembly 132 into the core assembly.
  • the distal end of the core assembly 134 includes a coupling 146, such as a clevis device, for adhering the core assembly to the rail vehicle.
  • the clevis device 146 includes one or more locking devices 148, such as lock nuts for coupling the core assembly to the rail vehicle.
  • the core assembly 134 includes a frame member 150, which may be formed of a variety of materials, such as aluminum or polymer.
  • the core assembly 134 includes a bore 152 defined therein that runs longitudinally through the core assembly.
  • the core assembly 134 also includes a plurality of slots 154 defined along the periphery of the core assembly to accommodate a plurality of magnet members 156.
  • the core assembly 134 includes four magnet members 156 disposed substantially concentrically about the core assembly.
  • the core assembly 134 further includes a pair of guideways 158 defined therein and adjacent to the bore 152.
  • a plurality of channels 159 are also defined in the core assembly 134 to accommodate the coil assembly 142 as will be described.
  • the coil assembly 142 is disposed at a distal end of the actuator rod 136 and is comprised of four coils 160 that are disposed in grooves defined in the actuator rod.
  • the coils 160 extend laterally outward from the actuator rod 136 and are sized and shaped to be received within the channels 159 defined in the core assembly 134.
  • a pair of guide bars 162 are also coupled to the actuator rod 136 to facilitate alignment of the rod assembly 132 as it is inserted into the core assembly 134. In that regard, the guide bars 162 are sized and shaped for insertion into the guideways 158 defined in the core assembly 134.
  • the linear actuator vibrator 130 may be actuated to achieve both linear motion and vibration simultaneously.
  • the controller 124 FIG. IB
  • the controller 124 may provide current flow to the coil assembly 142, which energizes the coils 160 to achieve linear motion of the rod assembly 132.
  • Such linear motion is at a right angle to the flow of current and magnetic field, and thus reversing the current flow (polarity) results in reverse motion.
  • the controller 124 may output two signals simultaneously - (1) a squeeze signal which linearly actuates the rod assembly 132, causing it to travel forward and thus impart a squeezing motion to the workhead to squeeze ballast, and (2) a vibrating signal to impart vibration to the workhead. The controller may then output a signal to reverse the motion of the rod assembly, returning it to its previous position and thus opening the workhead (paddles 110) in preparation for the next cycle.
  • Such linear motion and vibration may be used to actuate tools, such as the paddles 110 described with reference to FIG. 1A.
  • the use of multiple coils 160 in parallel achieves a linear thrust of up to 80 kN and vibration in the range of 35-50 Hz.
  • these measurements are only exemplary and, in some embodiments, additional thrust or vibration may be achieved.
  • the linear actuator vibrators 120 are driven by a servo drive, such as one provided by the controller 124, and thus sensors may be deployed to provide feedback to have variable amplitude reciprocal linear vibrations.
  • this disclosure is not limited to rail vehicles that perform tamping operations.
  • any rail operation that can benefit from linear thrust and vibration can also realize advantages of the present disclosure.
  • this disclosure is not limited to rail vehicles and the disclosed linear actuator vibrator may be used in any application requiring thrust and vibration.
  • non-rail applications are contemplated, such as construction equipment like gravel packers, jack hammers, and so forth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Power Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Abstract

L'invention concerne un véhicule d'entretien de rails comprenant un châssis, un organe de bourrage et une unité de vibration. Le châssis comprend des roues qui se déplacent le long de rails. L'unité de vibration comprend un élément tige auquel un ensemble bobine est accouplé. L'unité de vibration comprend en outre un ensemble partie centrale servant à recevoir l'élément tige en son sein. L'ensemble partie centrale comprend une pluralité d'éléments magnétiques disposés le long de la périphérie de l'ensemble partie centrale. L'ensemble bobine et les éléments magnétiques permettent d'imprimer un mouvement linéaire à l'élément tige par rapport à l'ensemble partie centrale.
PCT/US2018/027996 2017-04-18 2018-04-17 Actionneur linéaire pour applications ferroviaires WO2018195095A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18787290.8A EP3612678B1 (fr) 2017-04-18 2018-04-17 Unité de vibration pour unité de travail ferroviaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762486845P 2017-04-18 2017-04-18
US62/486,845 2017-04-18

Publications (1)

Publication Number Publication Date
WO2018195095A1 true WO2018195095A1 (fr) 2018-10-25

Family

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PCT/US2018/027996 WO2018195095A1 (fr) 2017-04-18 2018-04-17 Actionneur linéaire pour applications ferroviaires

Country Status (3)

Country Link
US (1) US10975526B2 (fr)
EP (1) EP3612678B1 (fr)
WO (1) WO2018195095A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516547B1 (de) * 2015-02-27 2016-06-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Stopfaggregat zum Unterstopfen von Schwellen eines Gleises
WO2018195095A1 (fr) * 2017-04-18 2018-10-25 Harsco Technologies LLC Actionneur linéaire pour applications ferroviaires

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440183A (en) * 1991-07-12 1995-08-08 Denne Developments, Ltd. Electromagnetic apparatus for producing linear motion
JPH0860601A (ja) * 1994-08-24 1996-03-05 Shibaura Eng Works Co Ltd 道床タンピング装置
US20070023244A1 (en) 2000-03-29 2007-02-01 Lord Corporation System comprising magnetically actuated motion control device
JP2007506539A (ja) * 2003-07-09 2007-03-22 ブラウン ゲーエムベーハー 振動変位を発生させるための電気モータを有する小型電気器具
US20170019012A1 (en) 2015-07-16 2017-01-19 Harsco Technologies LLC Coil-oscillator vibration unit for rail workhead

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10624119B2 (en) * 2015-04-08 2020-04-14 Qualcomm Incorporated Transmission scheduling for contention based carrier
WO2018195095A1 (fr) * 2017-04-18 2018-10-25 Harsco Technologies LLC Actionneur linéaire pour applications ferroviaires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440183A (en) * 1991-07-12 1995-08-08 Denne Developments, Ltd. Electromagnetic apparatus for producing linear motion
JPH0860601A (ja) * 1994-08-24 1996-03-05 Shibaura Eng Works Co Ltd 道床タンピング装置
US20070023244A1 (en) 2000-03-29 2007-02-01 Lord Corporation System comprising magnetically actuated motion control device
JP2007506539A (ja) * 2003-07-09 2007-03-22 ブラウン ゲーエムベーハー 振動変位を発生させるための電気モータを有する小型電気器具
US20170019012A1 (en) 2015-07-16 2017-01-19 Harsco Technologies LLC Coil-oscillator vibration unit for rail workhead

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3612678A4

Also Published As

Publication number Publication date
EP3612678A1 (fr) 2020-02-26
EP3612678B1 (fr) 2022-06-08
EP3612678A4 (fr) 2021-03-24
US20180298563A1 (en) 2018-10-18
US10975526B2 (en) 2021-04-13

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